How can we confirm Oxonium Ion present in graphene Oxide using FTIR or is there any other characterization technique to prove it?

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Can we perform Raman for Liquid solutions?

I want to take Raman for Graphene oxide solution. To do that, I planned to perform by placing a drop of graphene oxide in between two glass plates. is it a good method or bad method?

08 January 2023 3,590 5 View

Formation of SEI on Nb2O5/rGO electrode surface while performing EIS ?

I have obtained EIS data for Nb2O5/rGO composite for LIB anode using coincell type cell assembling using 5mV signal with frequency range 100 mHz to 1MHz. When modeling and fitting the Nyquist plot...

06 August 2022 922 0 View

Powder XRD of commercially avilable Nb2O5 ?

Can anyone share (or DOI of research article) a X- ray diffractogram with proper phases (analyzed) of commercially avilable powder Nb2O5 (−325 mesh, 99.9% trace metals basis, Sigma Aldrich)....

09 March 2022 3,691 4 View

Exact graphene oxide (GO) plane? (002) or (001) or what ?

I have synthesized graphene oxide by following modified hummers method. in PXRD, for a gaphene oxide, generally peak appered around 2(theta)= 11 degree. Eventhough graphite peak also appeared at...

20 February 2022 278 4 View

Is there any possibility to reduce the oxidation state of a powder by reacting with reducing agent ?

I want to change the oxidation state of Nb2O5 powder sample to lower number like +4 or +3. in this case I'm planned to dissolve Nb2O5 in water and added reducing agent like ascorbic acid ? do I...

19 January 2022 7,783 11 View

What is the reason for appearing hump (h) in a TiO2 as an Anode in lithium ion batteries ?

Here I attached the galvanostatic charge discharge profile of TiO2 as an anode for lithium ion battery. when battery charging a little hump can be seen as shown in region 2 before start the...

17 December 2021 9,884 3 View

Can anyone share FTIR spectrum of pure TiO2 and Nb2O5 ?

Can anyone share FTIR spectrums of commercially available TiO2 p21( p25 or p21) and Nb2O5 powders.

17 December 2021 8,190 3 View

What is the role of reduced graphene oxide in composites anodes in Lithium ion battery ?

what are the other purpose by adding graphene in to composite anodes in lithium ion battery rather than improving electronic conductivity in the potential range of 1-3 V vs Li/Li+

17 December 2021 6,988 6 View

How to analyze the Raman spectrum of pristine Nb2O5 ?

i have a Raman spectrum of pristine Nb2O5. The spectrum was fitted with lorentz function and matched with lot of unknown peaks. it would be great someone can explained spectrum. The corresponding...

11 December 2021 3,414 4 View

What is the reason for arising 3 peaks around 2theta value 24 degree in XRD in reduced graphene oxide ?

I have synthesized reduced graphene oxide(rGO) using Modified Hummer's Method. Then i was characterized the rGO sample using XRD. normally when graphite reduced to graphene there is appearing...

12 December 2020 7,381 2 View

What is the best conditions for formation Magnetite ore deposits?

I want to know more about Magnetite deposits.

06 August 2024 1,066 0 View

Short Synthesis of Graphene Oxide from Natural Graphite Flakes?

I am in search of a modified Hummer's method, which can be used to synthesis graphene oxide within 6-8 hours. As I am a student it is not allowed for us to work after 5 in the laboratory. So I am...

01 August 2024 8,368 2 View

How can I separate graphene from amorphous carbon of similar particle sizes?

The starting material is a finely ground powder. Some particles contain more graphene than others.

30 July 2024 3,978 2 View

What is the solubility of Iron (+3) in Bismuth Oxide?

Dear all: I am modifying Bismuth Tungstate with Hematite (Fe2O3), so I would like to know about how much Iron(+3) can form a solid solution in a Bismuth Oxide matrix. Best wishes Marco

29 July 2024 2,163 1 View

Has anyone looked into the stability of FEM methods on curved meshed?

Google scholar isn't giving me any results on this

27 July 2024 595 2 View

How can I decrease the error of Rietveld method for phase quantification?

Phase quantification in steel contain BCC and FCC

20 July 2024 8,150 7 View

A twin-shaft kiln or a rotary kiln for lime production 1 class? if compressive strength of limestone is low 60 MPa?

My research work is related to the calcination of limestone. I have a complex question and would like to consult with experts in this field. Could you please advise which kiln to choose (a...

18 July 2024 1,390 2 View

Can someone help with the instrument configuration in Profex using Rietveld Refinement?

I am trying to configure the instrument in Profex but I can't get a chi-squared value below 9.65 for LaB6. This is the configuration of the equipment, which is a Bruker D8 Advance with a Linxeye...

14 July 2024 4,767 1 View

Anyone working in Model updating technique using FEM?

I am trying to model RCC beam with induced corrosion. How to model this beam using model updating technique.

14 July 2024 3,536 3 View

I came across oscillations in a pressure profile for a pipeline flow along the axis of a cylinder, how do I prove that these are not numerical err?

In terms of CFD, we often analyze the stability of the error using Von-Neumann analysis, especially for FDM based problems. Should we follow the same approach for a compressible fluid flow using FVM ?

13 July 2024 6,296 5 View